Japan Geoscience Union Meeting 2019

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[E] Oral

A (Atmospheric and Hydrospheric Sciences ) » A-OS Ocean Sciences & Ocean Environment

[A-OS09] Ocean Mixing Processes: Impact on Biogeochemistry, Climate and Ecosystem

Sun. May 26, 2019 1:45 PM - 3:15 PM 303 (3F)

convener:Ichiro Yasuda(Atmosphere and Ocean Research Institute, The University of Tokyo), Toshiyuki Hibiya(Department of Earth and Planetary Science, Graduate School of Science, University of Tokyo), Jun Nishioka(Hokkaido University, Institute of low temperature sciences), Shin-ichi Ito(Atmosphere and Ocean Research Institute, The University of Tokyo), Chairperson:Shin-Ichi Ito(The University of Tokyo)

2:00 PM - 2:15 PM

[AOS09-13] Acoustic remote sensing of ocean mixing

★Invited Papers

*Tetjana Ross1, Andone Lavery2, Doris Leong3, Rolf Lueck4 (1.Institute Of Ocean Sciences, Fisheries and Oceans Canada, 2.Woods Hole Oceanographic Institution, 3.British Columbia Ministry of Forests, Lands, Natural Resource Operations and Rural Development, 4.Rockland Scientific International)

Keywords:oceanic turbulence and mixing, underwater acoustics , ocean observation, bio-physical interactions

Based on data collected in a number of environments, from coastal fjords to the north Atlantic, from the laboratory to Antarctica, we present evidence for sound scattering from turbulent and double diffusive microstructure in the ocean. We discuss the advantages of using acoustics to observe ocean mixing (i.e. inexpensive, fast and remote). We also discuss the limitations (e.g. ambiguity in source of scattering) and some methods for dealing with it. We illustrate how one of these ambiguities can even be turned into a strength for observing zooplankton in turbulence, through the use of broadband acoustics.